Cacti actually come from the American continent, but have spread around the world over the centuries. Today they are - depending on the type - also found in Europe, Africa, Australia and Asia. The greatest variety of cacti is still found in North and South America. Cacti, unlike the fungi belong to the plants. They are called succulent plants because they form a fleshy body. Succus is the Latin word for juice, which already points to the storage function of the cacti. Cacti and other succulents store namely water in the tissues of their body and use it only when required. A trick of nature. However, this leads to a widespread misconception that cacti never or very rarely have to be casted. That is not the case. Cacti also need to be watered or at worst they'll pine away.